I'm about to get this for my 99 cobra and I was wondring if you guys that already have this headers in theres car has seen what kind of inprovements as far as HP and TQ. My car is NA with the basic boltons, like JLT RAI, pully's, Basanni BX x-pipe/borla stinger cat back, 4.30 gears. Do you think they are worth the money? any feedback will be appreciated. thanks in advance.